Chapter 1 Flashcards
Servers that have a NOS installed require less memory, processing power, and storage capacity than clients because servers are called on to handle only light processing loads and requests from multiple clients.
F
The fundamental difference between a switch and a router is that a switch belongs only to its local network and a router belongs to two or more local networks.
T
After a problem and its symptoms have been identified, a theory regarding a probable cause should be established.
T
Static electricity is an electrical charge in motion.
F
The protocol data unit for the Physical layer of the OSI model is payload, or data.
F
The term firmware refers to programs embedded into hardware devices. This software only changes when a firmware upgrade is performed.
T
The Data Link layer attaches a trailer to the end of a packet, and does not include a header.
F
The Transport layer header addresses a receiving application by a number called a MAC address.
F
The Transmission Control Protocol (TCP) is considered to be a connectionless, or best-effort delivery protocol.
F
In general, an API (application programming interface) call is the method an application uses when it makes a request of the OS.
T
HTTP, IMAP4, FTP, and Telnet are all examples of protocols that operate at what layer of the OSI model?
A. Layer 7
B. Layer 6
C. Layer 5
D. Layer 4
Layer 7
What layer of the OSI model describes how data between applications is synced and recovered if messages don’t arrive intact at the receiving application?
A. Transport Layer
B. Application Layer
C. Presentation Layer
D. Session Layer
Session Layer
The Data Link Layer utilizes what name for its protocol data unit (PDU)?
A. data
B. bit
C. packet
D. frame
Frame
What statement accurately reflects what occurs when a message is too large to transport on a network?
A. The message is divided into smaller messages called segments (for TCP) or datagrams (for UDP).
B. The message is sent anyway, and is received by the destination as garbage data.
C. An ICMP error is generated, and the application must reformat the data for transmission.
D. The message is discarded and must be sent again.
The message is divided into smaller messages called segments (for TCP) or datagrams (for UDP).
What is a defining characteristic of a bus topology based network?
A. Devices are daisy-chained together in a single line.
B. Devices are directly attached to a network router, which forwards data to intended destinations.
C. Devices are connected directly to a centralized networking device, known as a network switch.
D. Devices are connected to two adjacent devices, and communication priority is granted by a token
Devices are daisy-chained together in a single line.
If your network consists of all connected devices connecting to one central device, such as a switch, what type of topology is being used? A. star topology B. star bus topology C. bus topology D. mesh topology
star topology
The proper handling procedures for substances such as chemical solvents is typically outlined in which of the following options?
A. Dangerous and Hazardous Waste Disposal Sheet (DHWDS)
B. Toxic Chemical Safety Procedure (TCSP)
C. Material Safety Data Sheet (MSDS)
D. Environmental Chemical Hazard Sheet (ECHS)
Material Safety Data Sheet (MSDS)
A policy in which all exit doors for a building stay unlocked during a fire is an example of what type of policy? A. fail-oriented B. fail-close C. fail-open D. fail-tolerant
fail-open
An open electrical circuit as a result of a failed circuit breaker is considered to be what type of failure system? A. fail-close B. fail-dynamic C. fail-tolerant D. fail-open
fail-close
At what layer of the OSI model does a network switch normally operate? A. Layer 3 B. Layer 4 C. Layer 2 D. Layer 5
Layer 2
Which of the following is not one of the disadvantages of peer-to-peer networks?
A. They are impractical for connecting large numbers of computers.
B. They lack scalability.
C. They centralize user account logins.
D. They are not necessarily secure.
They centralize user account logins.
At what layer of the OSI model do the IP, ICMP, and ARP protocols operate? A. Transport B. Application C. Session D. Network
Network
In considering the responsibilities of each layer of the OSI model, what statement accurately reflects those of the Presentation layer?
A. The Presentation layer is responsible for describing how data between applications is synced and recovered if messages don’t arrive intact at the receiving application.
B. The Presentation layer is responsible for transporting Application layer payloads from one application to another.
C. The Presentation layer describes the interface between two applications, each on separate computers.
D. The Presentation layer is responsible for reformatting, compressing, and/or encrypting data in a way that the application on the receiving end can read.
The Presentation layer is responsible for reformatting, compressing, and/or encrypting data in a way that the application on the receiving end can read.
Which of the following is an example of encapsulation?
A. The addition of a header to data inherited from the layer above in the OSI model.
B. The addition of a trailer to data inherited from the layer above in the OSI model.
C. The modification of headers from a higher layer in the OSI model.
D. The subtraction of a header from data inherited from the layer below in the OSI model.
The addition of a header to data inherited from the layer above in the OSI model.
